Lesion-by-lesion comparison of computerized tomography and indium-111-labeled monoclonal antibody C110 radioimmunoscintigraphy in colorectal carcinoma: a multicenter trial.

C110 is an anti-carcinoembryonic antigen murine IgG1 monoclonal antibody. Indium-111-labeled C110 radioimmunoscintigraphy (RIS) in colorectal cancer was studied in 51 presurgical patients at four institutions. Planar and SPECT images were obtained at least twice between 48 and 96 hr after injection of 5 mCi/5 mg of 111In-C110.

Improved detection of hepatic lesions using MoAb B72.3 and a modified 111In labelling technique in patients with recurrent colon cancer.

In this study, the clinical usefulness of 111In-SCN-Bz-diethylenetriaminepentaacetic acid (DTPA) monoclonal antibody (MoAb) B72.3 in patients with recurrent colorectal carcinoma was evaluated. In previous studies with radiolabelled MoAb B72.

Detection of recurrent colon cancer with In-111 labeled MoAb B72.3 in a patient with normal CEA and TAG-72 levels.

The usefulness of radioimmunoscintigraphy with In-111 labeled MoAb B72.3 is illustrated in this case report of a patient with an aggressive cancer of the ascending colon. When used in conjunction with CT, ultrasound examination, and MRI, radioimmunoscintigraphy improved the specificity of these other imaging modalities, although the patient's serum CEA and TAG-72 levels remained within the normal ranges.

Characterization of antibody-chelator conjugates: determination of chelator content by terbium fluorescence titration.

Fluorescence titrations were performed by adding varying mole ratios of terbium(III) to antibody conjugates formed by benzyl isothiocyanate derivatives of three different polyaminopolycarboxylate chelators (NTA, EDTA, and DTPA) and the results compared to values for average chelator content obtained by cobalt-57 binding assays. For two different murine monoclonal antibodies, the average chelator content obtained by terbium fluorescence titration correlated closely with that measured by the cobalt-57 binding assay. It is concluded that lanthanide fluorescence titrations provide a useful alternative to radiometal binding assays for the determination of chelator content in protein-chelator conjugates.

Detection of hepatic metastases from colorectal carcinoma using indium-111 (111In) labeled monoclonal antibody (mAb): MSKCC experience with mAb 111In-C110.

Sixteen patients with colorectal carcinoma and a rising serum carcinoembryonic antigen (CEA) level and no evidence of extra-abdominal disease were administered 5 mg of an anti-CEA monoclonal antibody (mAb), C110, labeled with approx. 5 mCi of 111In. All patients subsequently underwent exploratory laparotomy, and samples of tumor and normal tissue were obtained.